def capuaRuleFourB(srcStream):
'''
See capuaRuleOne for precise instructions.
Applies more probable interpretation of Capua's fourth rule to the given
srcStream, i.e. if a descending minor third is followed by a descending major
second, the intervals will be changed to a major third followed by a minor
second. Also copies any relevant accidental to note.editorial.misc under
"saved-accidental" and changes note.editorial.color for rule 4 (orange
green orange).
returns the number of times a note was changed.
'''
numChanged = 0
ssn = srcStream.flat.notesAndRests
for i in range(0, len(ssn) - 2):
n1 = ssn[i]
n2 = ssn[i + 1]
n3 = ssn[i + 2]
if n1.isRest or \
n2.isRest or \
n3.isRest:
continue
i1 = interval.notesToInterval(n1, n2)
i2 = interval.notesToInterval(n2, n3)
if n1.accidental is not None or \
n3.accidental is not None:
continue
### never seems to improve things...
if n2.step == "A" or n2.step == "D":
continue
# e.g., D F G => D F# G or G Bb C => G B C
if i1.directedName == "m3" and \
i2.directedName == "M2":
numChanged += 1
if ("capua" in n2.editorial.misc):
n2.editorial.misc['capua_rule_number'] += RULE_FOUR_B
else:
n2.editorial.misc['capua_rule_number'] = RULE_FOUR_B
if (n2.accidental is not None and n2.accidental.name == "flat"):
n2.editorial.misc["saved-accidental"] = n2.accidental
n2.accidental = None
n2.editorial.ficta = pitch.Accidental("natural")
n2.editorial.misc["capua-ficta"] = pitch.Accidental("natural")
n1.editorial.color = "orange"
n2.editorial.color = "green"
n3.editorial.color = "orange"
else:
n2.editorial.ficta = pitch.Accidental("sharp")
n2.editorial.misc["capua-ficta"] = pitch.Accidental("sharp")
n1.editorial.color = "orange"
n2.editorial.color = "green"
n3.editorial.color = "orange"
return numChanged
def capuaRuleOne(srcStream):
'''
Applies Nicolaus de Capua's first rule to the given srcStream, i.e. if a line descends
a major second then ascends back to the original note, the major second is
made into a minor second. Also copies the relevant accidentals into
`Note.editorial.misc["saved-accidental"]` and changes `Note.editorial.color`
for rule 1 (blue green blue).
The relevant Rule number is also stored in `Note.editorial.misc['capua_rule_number']` which
can be got out by OR-ing this.
Returns the number of notes that were changed (not counting notes whose colors were changed).
'''
numChanged = 0
ssn = srcStream.flat.notesAndRests
for i in range(0, len(ssn) - 2):
n1 = ssn[i]
n2 = ssn[i + 1]
n3 = ssn[i + 2]
if (n1.isRest or n2.isRest or n3.isRest):
continue
i1 = interval.notesToInterval(n1, n2)
i2 = interval.notesToInterval(n2, n3)
if (n1.pitch.accidental is not None
or n3.pitch.accidental is not None):
continue
### never seems to improve things...
if n2.step == "A" or n2.step == "D":
continue
## e.g. G, F, G => G, F#, G
if i1.directedName == "M-2" and \
i2.directedName == "M2":
numChanged += 1
if ("capua" in n2.editorial.misc):
n2.editorial.misc['capua_rule_number'] += RULE_ONE
else:
n2.editorial.misc['capua_rule_number'] = RULE_ONE
if (n2.pitch.accidental is not None
and n2.pitch.accidental.name == "flat"):
n2.editorial.misc["saved-accidental"] = n2.pitch.accidental
n2.pitch.accidental = None
n2.editorial.ficta = pitch.Accidental("natural")
n2.editorial.misc["capua-ficta"] = pitch.Accidental("natural")
n1.editorial.color = "blue"
n2.editorial.color = "forestGreen"
n3.editorial.color = "blue"
else:
n2.editorial.ficta = pitch.Accidental("sharp")
n2.editorial.misc["capua-ficta"] = pitch.Accidental("sharp")
n1.editorial.color = "blue"
n2.editorial.color = "ForestGreen"
n3.editorial.color = "blue"
return numChanged
def capuaRuleOne(srcStream):
'''
Applies Nicolaus de Capua's first rule to the given srcStream, i.e. if a line descends
a major second then ascends back to the original note, the major second is
made into a minor second. Also copies the relevant accidentals into
`Note.editorial.savedAccidental` and changes `Note.style.color`
for rule 1 (blue green blue).
The relevant Rule number is also stored in `Note.editorial.capuaRuleNumber']` which
can be got out by OR-ing this.
Returns the number of notes that were changed (not counting notes whose colors were changed).
'''
numChanged = 0
ssn = srcStream.flat.notesAndRests
for i in range(len(ssn) - 2):
n1 = ssn[i]
n2 = ssn[i + 1]
n3 = ssn[i + 2]
if n1.isRest or n2.isRest or n3.isRest:
continue
i1 = interval.notesToInterval(n1, n2)
i2 = interval.notesToInterval(n2, n3)
if (n1.pitch.accidental is not None
or n3.pitch.accidental is not None):
continue
# never seems to improve things...
if n2.step == 'A' or n2.step == 'D':
continue
# e.g. G, F, G => G, F#, G
if (i1.directedName == 'M-2' and i2.directedName == 'M2'):
numChanged += 1
if 'capuaRuleNumber' in n2.editorial:
n2.editorial.capuaRuleNumber += RULE_ONE
else:
n2.editorial.capuaRuleNumber = RULE_ONE
if n2.pitch.accidental is not None and n2.pitch.accidental.name == 'flat':
n2.editorial.savedAccidental = n2.pitch.accidental
n2.pitch.accidental = None
n2.editorial.ficta = pitch.Accidental('natural')
n2.editorial.capuaFicta = pitch.Accidental('natural')
n1.style.color = 'blue'
n2.style.color = 'forestGreen'
n3.style.color = 'blue'
else:
n2.editorial.ficta = pitch.Accidental('sharp')
n2.editorial.capuaFicta = pitch.Accidental('sharp')
n1.style.color = 'blue'
n2.style.color = 'ForestGreen'
n3.style.color = 'blue'
return numChanged
def capuaRuleFourB(srcStream):
'''
See capuaRuleOne for precise instructions.
Applies more probable interpretation of Capua's fourth rule to the given
srcStream, i.e. if a descending minor third is followed by a descending major
second, the intervals will be changed to a major third followed by a minor
second. Also copies any relevant accidental to note.editorial.savedAccidental
and changes note.style.color for rule 4 (orange
green orange).
returns the number of times a note was changed.
'''
numChanged = 0
ssn = srcStream.flat.notesAndRests
for i in range(len(ssn) - 2):
n1 = ssn[i]
n2 = ssn[i + 1]
n3 = ssn[i + 2]
if n1.isRest or n2.isRest or n3.isRest:
continue
i1 = interval.notesToInterval(n1, n2)
i2 = interval.notesToInterval(n2, n3)
if (n1.pitch.accidental is not None
or n3.pitch.accidental is not None):
continue
# never seems to improve things...
if n2.step == 'A' or n2.step == 'D':
continue
# e.g., D F G => D F# G or G Bb C => G B C
if i1.directedName == 'm3' and i2.directedName == 'M2':
numChanged += 1
if 'capuaRuleNumber' in n2.editorial:
n2.editorial.capuaRuleNumber += RULE_FOUR_B
else:
n2.editorial.capuaRuleNumber = RULE_FOUR_B
if n2.pitch.accidental is not None and n2.pitch.accidental.name == 'flat':
n2.editorial.savedAccidental = n2.pitch.accidental
n2.pitch.accidental = None
n2.editorial.ficta = pitch.Accidental('natural')
n2.editorial.capuaFicta = pitch.Accidental('natural')
n1.style.color = 'orange'
n2.style.color = 'green'
n3.style.color = 'orange'
else:
n2.editorial.ficta = pitch.Accidental('sharp')
n2.editorial.capuaFicta = pitch.Accidental('sharp')
n1.style.color = 'orange'
n2.style.color = 'green'
n3.style.color = 'orange'
return numChanged
def capuaRuleFourA(srcStream):
'''
See capuaRuleOne for precise instructions.
Applies one interpretation of Capua's fourth rule to the given srcStream,
i.e. if a descending minor third is followed by a descending major second,
the intervals will be changed to a major third followed by a minor second.
Also changes note.editorial.color for rule 4 (orange green orange).
returns the number of notes that were changed
This rule is a less likely interpretation of the ambiguous rule 4, thus
applyCapuaToStream uses capuaRuleFourB instead.
'''
numChanged = 0
ssn = srcStream.flat.notesAndRests
for i in range(0, len(ssn) - 2):
n1 = ssn[i]
n2 = ssn[i + 1]
n3 = ssn[i + 2]
if n1.isRest or \
n2.isRest or \
n3.isRest:
continue
i1 = interval.notesToInterval(n1, n2)
i2 = interval.notesToInterval(n2, n3)
if n1.accidental is not None or \
n2.accidental is not None or \
n3.accidental is not None:
continue
### never seems to improve things...
if n2.step == "A" or n2.step == "D":
continue
# e.g., D B A => D Bb A
if i1.directedName == "m-3" and \
i2.directedName == "M-2":
numChanged += 1
if ("capua" in n2.editorial.misc):
n2.editorial.misc['capua_rule_number'] += RULE_FOUR_A
else:
n2.editorial.misc['capua_rule_number'] = RULE_FOUR_A
n2.editorial.ficta = pitch.Accidental("flat")
n2.editorial.misc["capua-ficta"] = pitch.Accidental("flat")
n1.editorial.color = "orange"
n2.editorial.color = "ForestGreen"
n3.editorial.color = "orange"
return numChanged
def capuaRuleThree(srcStream):
'''
See capuaRuleOne for precise instructions.
Applies Capua's third rule to the given srcStream, i.e. if there is a
descending major third followed by an ascending major second, the second
note will be made a half-step higher so that there is a descending minor
third followed by an ascending minor second. Also changes
note.editorial.color for rule 3 (pink green pink).
returns the number of times a note was changed
'''
numChanged = 0
ssn = srcStream.flat.notesAndRests
for i in range(0, len(ssn) - 2):
n1 = ssn[i]
n2 = ssn[i + 1]
n3 = ssn[i + 2]
if n1.isRest or \
n2.isRest or \
n3.isRest:
continue
i1 = interval.notesToInterval(n1, n2)
i2 = interval.notesToInterval(n2, n3)
if n1.accidental is not None or \
n2.accidental is not None or \
n3.accidental is not None:
continue
### never seems to improve things...
if n2.step == "A" or n2.step == "D":
continue
# e.g., E C D => E C# D
if i1.directedName == "M-3" and \
i2.directedName == "M2":
numChanged += 1
if ("capua" in n2.editorial.misc):
n2.editorial.misc['capua_rule_number'] += RULE_THREE
else:
n2.editorial.misc['capua_rule_number'] = RULE_THREE
n2.editorial.ficta = pitch.Accidental("sharp")
n2.editorial.misc["capua-ficta"] = pitch.Accidental("sharp")
n1.editorial.color = "DeepPink"
n2.editorial.color = "ForestGreen"
n3.editorial.color = "DeepPink"
return numChanged
def capuaRuleFourA(srcStream):
'''
See capuaRuleOne for precise instructions.
Applies one interpretation of Capua's fourth rule to the given srcStream,
i.e. if a descending minor third is followed by a descending major second,
the intervals will be changed to a major third followed by a minor second.
Also changes note.style.color for rule 4 (orange green orange).
returns the number of notes that were changed
This rule is a less likely interpretation of the ambiguous rule 4, thus
applyCapuaToStream uses capuaRuleFourB instead.
'''
numChanged = 0
ssn = srcStream.flat.notesAndRests
for i in range(len(ssn) - 2):
n1 = ssn[i]
n2 = ssn[i + 1]
n3 = ssn[i + 2]
if n1.isRest or n2.isRest or n3.isRest:
continue
i1 = interval.notesToInterval(n1, n2)
i2 = interval.notesToInterval(n2, n3)
if (n1.pitch.accidental is not None or n2.pitch.accidental is not None
or n3.pitch.accidental is not None):
continue
# never seems to improve things...
if n2.step == 'A' or n2.step == 'D':
continue
# e.g., D B A => D Bb A
if i1.directedName == 'm-3' and i2.directedName == 'M-2':
numChanged += 1
if 'capuaRuleNumber' in n2.editorial:
n2.editorial.capuaRuleNumber += RULE_FOUR_A
else:
n2.editorial.capuaRuleNumber = RULE_FOUR_A
n2.editorial.ficta = pitch.Accidental('flat')
n2.editorial.capuaFicta = pitch.Accidental('flat')
n1.style.color = 'orange'
n2.style.color = 'ForestGreen'
n3.style.color = 'orange'
return numChanged
def capuaRuleThree(srcStream):
'''
See capuaRuleOne for precise instructions.
Applies Capua's third rule to the given srcStream, i.e. if there is a
descending major third followed by an ascending major second, the second
note will be made a half-step higher so that there is a descending minor
third followed by an ascending minor second. Also changes
note.style.color for rule 3 (pink green pink).
returns the number of times a note was changed
'''
numChanged = 0
ssn = srcStream.flat.notesAndRests
for i in range(len(ssn) - 2):
n1 = ssn[i]
n2 = ssn[i + 1]
n3 = ssn[i + 2]
if n1.isRest or n2.isRest or n3.isRest:
continue
i1 = interval.notesToInterval(n1, n2)
i2 = interval.notesToInterval(n2, n3)
if (n1.pitch.accidental is not None or n2.pitch.accidental is not None
or n3.pitch.accidental is not None):
continue
# never seems to improve things...
if n2.step == 'A' or n2.step == 'D':
continue
# e.g., E C D => E C# D
if (i1.directedName == 'M-3' and i2.directedName == 'M2'):
numChanged += 1
if 'capuaRuleNumber' in n2.editorial:
n2.editorial.capuaRuleNumber += RULE_THREE
else:
n2.editorial.capuaRuleNumber = RULE_THREE
n2.editorial.ficta = pitch.Accidental('sharp')
n2.editorial.capuaFicta = pitch.Accidental('sharp')
n1.style.color = 'DeepPink'
n2.style.color = 'ForestGreen'
n3.style.color = 'DeepPink'
return numChanged
def _addAccidental(self, n, alter, pm, t):
r'''
helper function for all accidental types.
>>> nToken = tinyNotation.NoteToken('BB--')
>>> n = note.Note('B')
>>> n.octave = 2
>>> tPost = nToken._addAccidental(n, -2, r'(\-+)', 'BB--')
>>> tPost
'BB'
>>> n.pitch.accidental
<accidental double-flat>
>>> nToken = tinyNotation.NoteToken('BB(--)')
>>> nToken.isEditorial = True
>>> n = note.Note('B')
>>> n.octave = 2
>>> tPost = nToken._addAccidental(n, -2, r'(\-+)', 'BB--')
>>> tPost
'BB'
>>> n.editorial.ficta
<accidental double-flat>
'''
acc = pitch.Accidental(alter)
if self.isEditorial:
n.editorial.ficta = acc
else:
n.pitch.accidental = acc
t = re.sub(pm, '', t)
return t
def testMeasureCopyingB(self):
from music21 import converter
from music21 import pitch
src = """m1 G: IV || b3 d: III b4 ii
m2 v b2 III6 b3 iv6 b4 ii/o6/5
m3 i6/4 b3 V
m4-5 = m2-3
m6-7 = m4-5
"""
s = converter.parse(src, format='romantext')
rnStream = s.flat.getElementsByClass('RomanNumeral')
for elementNumber in [0, 6, 12]:
self.assertEqual(rnStream[elementNumber + 4].figure, 'III6')
self.assertEqual(
str([str(p) for p in rnStream[elementNumber + 4].pitches]),
"['A4', 'C5', 'F5']")
x = rnStream[elementNumber + 4].pitches[2].accidental
if x == None:
x = pitch.Accidental('natural')
self.assertEqual(x.alter, 0)
self.assertEqual(rnStream[elementNumber + 5].figure, 'iv6')
self.assertEqual(
str([str(p) for p in rnStream[elementNumber + 5].pitches]),
"['B-4', 'D5', 'G5']")
self.assertEqual(
rnStream[elementNumber +
5].pitches[0].accidental.displayStatus, True)
def accidentalFromAlter(self, alterElement):
'''
return a :class:`~music21.pitch.Accidental` object from an <alter> tag.
>>> ci = capella.fromCapellaXML.CapellaImporter()
>>> alter = ci.domElementFromText('<alter step="-1"/>')
>>> ci.accidentalFromAlter(alter)
<accidental flat>
The only known display type is "suppress"
>>> alter = ci.domElementFromText('<alter step="2" display="suppress"/>')
>>> acc = ci.accidentalFromAlter(alter)
>>> acc
<accidental double-sharp>
>>> acc.displayType
'never'
'''
if 'step' in alterElement._attrs:
alteration = int(alterElement._attrs['step'].value)
acc = pitch.Accidental(alteration)
if 'display' in alterElement._attrs and alterElement._attrs[
'display'].value == 'suppress':
acc.displayType = 'never'
return acc
def _toAccidental(self):
'''
>>> from music21.figuredBass import notation as n
>>> m1 = n.Modifier('#')
>>> m2 = n.Modifier('-')
>>> m3 = n.Modifier('n')
>>> m4 = n.Modifier('+') #Raises pitch by semitone
>>> m5 = n.Modifier('b') #acceptable for flat since note names not allowed
>>> m1.accidental
<accidental sharp>
>>> m2.accidental
<accidental flat>
>>> m3.accidental
<accidental natural>
>>> m4.accidental
<accidental sharp>
>>> m5.accidental
<accidental flat>
'''
if not self.modifierString:
return None
a = pitch.Accidental()
try:
a.set(self.modifierString)
except pitch.AccidentalException:
try:
newModifierString = specialModifiers[self.modifierString]
except KeyError:
raise ModifierException(
"Figure modifier unsupported in music21: %s." % self.modifierString)
a.set(newModifierString)
return a
def getOnePitchFromPosition(self, pos):
'''
get one pitch from a position...
>>> nwt = noteworthy.translate.NoteworthyTranslator()
>>> nwt.currentClef = 'BASS'
>>> p = nwt.getOnePitchFromPosition('b3')
>>> p
<music21.pitch.Pitch G-3>
>>> p.ps
54.0
'''
accidental = ""
if pos[0] in ['n', 'b', '#', 'x', 'v']:
accidental = pos[0]
pos = pos[1:]
if accidental == 'b':
accidental = '-'
elif accidental == 'x':
accidental = '##'
elif accidental == 'v':
accidental = "--"
positionNote = int(pos)
(noteStep, octave) = self.getStepAndOctaveFromPosition(positionNote)
p = pitch.Pitch()
p.step = noteStep
p.octave = octave
pname = p.nameWithOctave
if accidental != "":
p.accidental = pitch.Accidental(accidental)
self.activeAccidentals[pname] = accidental
## previous accidental in same bar that is still active
elif pname in self.activeAccidentals:
p.accidental = pitch.Accidental(self.activeAccidentals[pname])
else:
stepAccidental = self.currentKey.accidentalByStep(noteStep)
if stepAccidental is not None:
p.accidental = stepAccidental
return p
def _addAccidental(self, n, alter, pm, t):
'''
helper function for all accidental types.
'''
acc = pitch.Accidental(alter)
if self.isEditorial:
n.editorial.ficta = acc
else:
n.pitch.accidental = acc
t = re.sub(pm, '', t)
return t
def testGetAccidentalCountIntermediate(self):
s = stream.Stream()
s.append(note.Note("C4")) # no accidental
s.append(note.Note("C#4")) # sharp
s.append(note.Note("D-4")) # flat
self.assertEqual(getAccidentalCount(s), {'flat': 1, 'sharp': 1})
self.assertEqual(getAccidentalCount(s, True), {'flat': 1, 'sharp': 1, 'natural': 1})
note4 = note.Note("C4")
self.assertIsNone(note4.pitch.accidental)
note4.pitch.accidental = pitch.Accidental('natural') # add a natural accidental
s.append(note4)
self.assertEqual(getAccidentalCount(s), {'flat': 1, 'sharp': 1, 'natural': 1})
def modifyPitch(self, pitchToAlter, inPlace=False):
'''
Given a :class:`~music21.pitch.Pitch`, modify its :attr:`~music21.pitch.Pitch.accidental`
given the Modifier's :attr:`~music21.figuredBass.notation.Modifier.accidental`.
>>> from music21 import pitch
>>> from music21.figuredBass import notation
>>> m1 = notation.Modifier('#')
>>> m2 = notation.Modifier('-')
>>> m3 = notation.Modifier('n')
>>> p1a = pitch.Pitch('D5')
>>> m1.modifyPitch(p1a) # Sharp
<music21.pitch.Pitch D#5>
>>> m2.modifyPitch(p1a) # Flat
<music21.pitch.Pitch D-5>
>>> p1b = pitch.Pitch('D#5')
>>> m3.modifyPitch(p1b)
<music21.pitch.Pitch D5>
OMIT_FROM_DOCS
>>> m4 = notation.Modifier('##')
>>> m5 = notation.Modifier('--')
>>> p2 = pitch.Pitch('F5')
>>> m4.modifyPitch(p2) # Double Sharp
<music21.pitch.Pitch F##5>
>>> m5.modifyPitch(p2) # Double Flat
<music21.pitch.Pitch F--5>
'''
if not inPlace:
pitchToAlter = copy.deepcopy(pitchToAlter)
if self.accidental == None:
return pitchToAlter
if self.accidental.alter == 0.0:
pitchToAlter.accidental = self.accidental
else:
if pitchToAlter.accidental == None:
pitchToAlter.accidental = self.accidental
else:
newAccidental = pitch.Accidental()
newAlter = pitchToAlter.accidental.alter + self.accidental.alter
try:
newAccidental.set(newAlter)
pitchToAlter.accidental = newAccidental
except pitch.AccidentalException:
raise ModifierException(
"Resulting pitch accidental unsupported in music21.")
return pitchToAlter
def testStreamLilySemiComplex(self):
from copy import deepcopy
from music21 import meter, note, stream, pitch, duration
a = stream.Stream()
ts = meter.TimeSignature("3/8")
b = stream.Stream()
q = note.EighthNote()
dur1 = duration.Duration()
dur1.type = "eighth"
tup1 = duration.Tuplet()
tup1.tupletActual = [5, dur1]
tup1.tupletNormal = [3, dur1]
q.octave = 2
q.duration.appendTuplet(tup1)
for i in range(0, 5):
b.append(deepcopy(q))
b.elements[i].accidental = pitch.Accidental(i - 2)
b.elements[0].duration.tuplets[0].type = "start"
b.elements[-1].duration.tuplets[0].type = "stop"
b2temp = b.elements[2]
c = b2temp.editorial
c.comment.text = "a real C"
bestC = b.bestClef(allowTreble8vb=True)
a.insert(bestC)
a.insert(ts)
a.insert(b)
conv = LilypondConverter()
outStr = conv.fromObject(a)
testStr = u'\n { \\clef "bass" \\time 3/8 \n { \\times 3/5 {ceses,8 ces,8 c,8_"a real C" cis,8 cisis,8} } }'
# for i in range(len(outStr)):
# self.assertEqual(outStr[i], testStr[i])
# print outStr
# print testStr
self.assertEqual(outStr, testStr)
def toAccidental(self, value, accidentalObject=None):
'''
Converts a string to an accidental (or adds it to the current
accidentalObject). If accidentalObject passed in is None
returns the new accidental
>>> from music21 import *
>>> importer = lily.translate.LilypondImporter()
>>> acc = importer.toAccidental('eses')
>>> acc
<accidental double-flat>
>>> acc2 = importer.toAccidental('eh!?')
>>> acc2
<accidental half-flat>
>>> acc2.displayType
'always'
>>> acc2.displayStyle
'parentheses'
'''
if accidentalObject is None:
returnAccidental = True
from music21 import pitch
accidentalObject = pitch.Accidental()
else:
returnAccidental = False
if value.endswith('?'):
value = value[0:len(value) - 1]
accidentalObject.displayStyle = "parentheses"
if value.endswith('!'):
value = value[0:len(value) - 1]
accidentalObject.displayType = "always"
if value in self.accidentalConvert:
accidentalObject.name = self.accidentalConvert[value]
else:
raise LilyTranslateException(
'Cannot convert this value to an accidental %s.' % value)
if returnAccidental is True:
return accidentalObject
def visit_body(self, node, children):
ch = chant.Chant()
curSection = chant.Section()
curClef = chant.Clef()
curGABCClef = None
# First pass: add measurs
for word in children:
if not isinstance(word, chant.Word): raise Exception('Quoi?')
curSection.append(word)
# Scope of accidentals ends with word boundaries
curClefHasFlat = curGABCClef in ['cb1', 'cb2', 'cb3', 'cb4']
bIsFlat = False or curClefHasFlat
bIsNatural = False
eIsFlat = False
eIsNatural = False
# Update the pitches of all notes based on the the clef
# and accidentals
for el in word.flat:
if isinstance(el, note.Note):
if curGABCClef is None:
raise MissingClef('Missing clef! Cannot process notes without a clef.')
position = el.editorial.gabcPosition
stepWithOctave = gabcPositionToStep(position, curGABCClef)
el.nameWithOctave = stepWithOctave
if bIsNatural and el.step == 'B':
el.pitch.accidental = pitch.Accidental('natural')
elif eIsNatural and el.step == 'E':
el.pitch.accidental = pitch.Accidental('natural')
elif bIsFlat and el.step == 'B':
el.pitch.accidental = pitch.Accidental('flat')
elif eIsFlat and el.step == 'E':
el.pitch.accidental = pitch.Accidental('flat')
elif isinstance(el, chant.Alteration):
if curGABCClef is None:
raise MissingClef('Cannot process notes without a clef.')
position = el.editorial.gabcPosition
step = gabcPositionToStep(position, curGABCClef)
el.pitch = pitch.Pitch(step)
# Reset alterations
bIsFlat = False or curClefHasFlat
bIsNatural = False
eIsFlat = False
eIsNatural = False
# Update
if isinstance(el, chant.Flat) and el.pitch.step == 'E':
eIsFlat = True
elif isinstance(el, chant.Flat) and el.pitch.step == 'B':
bIsFlat = True
elif isinstance(el, chant.Natural) and el.pitch.step == 'B':
bIsNatural = True
elif isinstance(el, chant.Natural) and el.pitch.step == 'E':
eIsNatural = True
# Scope of accidentals ends at breathmarks
elif isinstance(el, chant.Pausa):
bIsFlat = False or curClefHasFlat
bIsNatural = False
eIsFlat = False
eIsNatural = False
# Intermediate sections start (!) at pausa finalis (double barlines)
# because annotations below them always refer to the next sections.
# The very last pausa finalis is part of the last section though
if isinstance(el, chant.PausaFinalis):
if not word == children[-1]:
curSection.remove(word)
ch.append(curSection)
curSection = chant.Section()
curSection.append(word)
else:
ch.append(curSection)
curSection = chant.Section()
elif isinstance(el, chant.Clef):
curClef = el
curGABCClef = curClef.editorial.gabc
elif isinstance(el, chant.Annotation):
pass
else:
raise Exception('Unknown element')
if len(curSection.flat) > 0:
ch.append(curSection)
# ch.joinTextAcrossPausas()
return ch
def _getNote(self):
if self._note is not None:
return self._note
noteObj = None
storedtie = None
stringRep = self.stringRep
storedDict = self.storedDict
if stringRep is None:
raise TinyNotationException(
'Cannot return a note without some parameters')
if self.PRECTIE.match(stringRep):
environLocal.printDebug('Found Front Tie')
stringRep = self.PRECTIE.sub("", stringRep)
storedtie = tie.Tie("stop")
storedDict['lastNoteTied'] = False
elif 'lastNoteTied' in storedDict and storedDict[
'lastNoteTied'] is True:
storedtie = tie.Tie("stop")
storedDict['lastNoteTied'] = False
x = self.customPitchMatch(stringRep, storedDict)
if x is not None:
noteObj = x
elif (self.REST.match(stringRep) is not None): # rest
noteObj = note.Rest()
elif (self.OCTAVE2.match(stringRep)): # BB etc.
nn = self.OCTAVE2.match(stringRep)
noteObj = self._getPitch(nn, 3 - len(nn.group(1)))
elif (self.OCTAVE3.match(stringRep)):
noteObj = self._getPitch(self.OCTAVE3.match(stringRep), 3)
elif (self.OCTAVE5.match(stringRep)): # must match octave 5 then 4!
nn = self.OCTAVE5.match(stringRep)
noteObj = self._getPitch(nn, 4 + len(nn.group(2)))
elif (self.OCTAVE4.match(stringRep)):
noteObj = self._getPitch(self.OCTAVE4.match(stringRep), 4)
else:
raise TinyNotationException(
"could not get pitch information from " + str(stringRep))
if storedtie:
noteObj.tie = storedtie
## get duration
usedLastDuration = False
if (self.TYPE.search(stringRep)):
typeNum = self.TYPE.search(stringRep).group(1)
if (typeNum == "0"): ## special case = full measure + fermata
if 'barDuration' in storedDict:
noteObj.duration = storedDict['barDuration']
newFerm = expressions.Fermata()
noteObj.expressions.append(newFerm)
else:
noteObj.duration.type = duration.typeFromNumDict[int(typeNum)]
else:
if 'lastDuration' in storedDict:
noteObj.duration = copy.deepcopy(storedDict['lastDuration'])
usedLastDuration = True
if (noteObj.duration.tuplets):
noteObj.duration.tuplets[0].type = ""
# if it continues a tuplet it cannot be start; maybe end
## get dots; called out because subclassable
self.getDots(stringRep, noteObj)
## get ties
if self.TIE.search(stringRep):
environLocal.printDebug('Found Tie Tie')
storedDict['lastNoteTied'] = True
if noteObj.tie is None:
noteObj.tie = tie.Tie("start")
else:
noteObj.tie.type = 'continue'
## use dict to set tuplets
if ((('inTrip' in storedDict and storedDict['inTrip'] == True) or
('inQuad' in storedDict and storedDict['inQuad'] == True))
and usedLastDuration == False):
newTup = duration.Tuplet()
newTup.durationActual.type = noteObj.duration.type
newTup.durationNormal.type = noteObj.duration.type
if 'inQuad' in storedDict and storedDict['inQuad'] == True:
newTup.numNotesActual = 4.0
newTup.numNotesNormal = 3.0
if 'beginTuplet' in storedDict and storedDict[
'beginTuplet'] == True:
newTup.type = "start"
noteObj.duration.appendTuplet(newTup)
if ((('inTrip' in storedDict and storedDict['inTrip'] == True) or
('inQuad' in storedDict and storedDict['inQuad'] == True)) and
('endTuplet' in storedDict and storedDict['endTuplet'] == True)):
noteObj.duration.tuplets[0].type = "stop"
storedDict['lastDuration'] = noteObj.duration
## get accidentals
if (isinstance(noteObj, note.Note)):
if (self.EDSHARP.search(stringRep)): # must come before sharp
alter = len(self.EDSHARP.search(stringRep).group(1))
acc1 = pitch.Accidental(alter)
noteObj.editorial.ficta = acc1
noteObj.editorial.misc['pmfc-ficta'] = acc1
elif (self.EDFLAT.search(stringRep)): # must come before flat
alter = -1 * len(self.EDFLAT.search(stringRep).group(1))
acc1 = pitch.Accidental(alter)
noteObj.editorial.ficta = acc1
noteObj.editorial.misc['pmfc-ficta'] = acc1
elif (self.EDNAT.search(stringRep)):
acc1 = pitch.Accidental("natural")
noteObj.editorial.ficta = acc1
noteObj.editorial.misc['pmfc-ficta'] = acc1
noteObj.accidental = acc1
elif (self.SHARP.search(stringRep)):
alter = len(self.SHARP.search(stringRep).group(1))
noteObj.accidental = pitch.Accidental(alter)
elif (self.FLAT.search(stringRep)):
alter = -1 * len(self.FLAT.search(stringRep).group(1))
noteObj.accidental = pitch.Accidental(alter)
self.customNotationMatch(noteObj, stringRep, storedDict)
if self.ID_EL.search(stringRep):
noteObj.id = self.ID_EL.search(stringRep).group(1)
if self.LYRIC.search(stringRep):
noteObj.lyric = self.LYRIC.search(stringRep).group(1)
self._note = noteObj
return self._note
def partPari(show = True):
'''
generate the score of Arvo Pärt's "Pari Intervallo" algorithmically
using music21.scale.ConcreteScale() to simulate Tintinabulation.
'''
s = stream.Score()
cminor = key.Key('c')
#real Paert
main = converter.parse("tinynotation: 4/4 E-1 C D E- F G F E- D C D E- G A- F G E- F G F E- D F G c B- c G A- B- c B- A- B- G c e- d c d c B- A- G F E- F G c E- F G E- D E- F E- D C E- G F E- C F E- D C E- D C D C~ C")
# fake Paert
#main = converter.parse("E-1 F G A- G F c d e- G A- F E- D d e- c B- A- c d A- G F G F A- B- A- c d A- B- c B- A- G F G F E-~ E-", '4/4')
main.__class__ = stream.Part
main.transpose('P8', inPlace=True)
main.insert(0, cminor)
main.insert(0, instrument.Recorder())
bass = copy.deepcopy(main.flat)
for n in bass.notes:
n.pitch.diatonicNoteNum = n.pitch.diatonicNoteNum - 9
if (n.pitch.step == 'A' or n.pitch.step == 'B') and n.pitch.octave == 2:
n.accidental = pitch.Accidental('natural')
else:
n.accidental = cminor.accidentalByStep(n.step)
if n.offset == (2-1) * 4 or n.offset == (74-1) * 4:
n.pitch = pitch.Pitch("C3") # exceptions to rule
elif n.offset == (73 - 1) * 4:
n.tie = None
n.pitch = pitch.Pitch("C3")
top = copy.deepcopy(main.flat)
main.insert(0, clef.Treble8vbClef())
middle = copy.deepcopy(main.flat)
cMinorArpeg = scale.ConcreteScale(pitches = ["C2","E-2","G2"])
# dummy test on other data
#myA = pitch.Pitch("A2")
#myA.microtone = -15
#cMinorArpeg = scale.ConcreteScale(pitches = ["C2", "E`2", "F~2", myA])
lastNote = top.notes[-1]
top.remove(lastNote)
for n in top:
if 'Note' in n.classes:
n.pitch = cMinorArpeg.next(n.pitch, stepSize=2)
if n.offset != (73-1)*4.0: # m. 73 is different
n.duration.quarterLength = 3.0
top.insert(n.offset + 3, note.Rest())
else:
n.duration.quarterLength = 6.0
n.tie = None
r1 = note.Rest(type = 'half')
top.insertAndShift(0, r1)
top.getElementsByClass(key.Key)[0].setOffsetBySite(top, 0)
lastNote = middle.notes[-1]
middle.remove(lastNote)
for n in middle:
if 'Note' in n.classes:
n.pitch = cMinorArpeg.next(n.pitch, direction=scale.DIRECTION_DESCENDING, stepSize=2)
if n.offset != (73-1)*4.0: # m. 73 is different
n.duration.quarterLength = 3.0
middle.insert(n.offset + 3, note.Rest())
else:
n.duration.quarterLength = 5.0
n.tie = None
r2 = note.Rest(quarterLength = 3.0)
middle.insertAndShift(0, r2)
middle.getElementsByClass(key.Key)[0].setOffsetBySite(middle, 0)
ttied = top.makeMeasures().makeTies(inPlace=False)
mtied = middle.makeMeasures().makeTies(inPlace=False)
bass.makeMeasures(inPlace = True)
main.makeMeasures(inPlace = True)
s.insert(0, ttied)
s.insert(0, main)
s.insert(0, mtied)
s.insert(0, bass)
for p in s.parts:
p.getElementsByClass(stream.Measure)[-1].rightBarline = bar.Barline('final')
if show == True:
s.show()
def toPart(volpianoText, *, breaksToLayout=False):
# noinspection PyShadowingNames
'''
Returns a music21 Part from volpiano text.
>>> veniSancti = volpiano.toPart('1---c--d---f--d---ed--c--d---f'
... + '---g--h--j---hgf--g--h---')
>>> veniSancti.show('text')
{0.0} <music21.stream.Measure 0 offset=0.0>
{0.0} <music21.clef.TrebleClef>
{0.0} <music21.note.Note C>
{1.0} <music21.note.Note D>
{2.0} <music21.note.Note F>
{3.0} <music21.note.Note D>
{4.0} <music21.note.Note E>
{5.0} <music21.note.Note D>
{6.0} <music21.volpiano.Neume <music21.note.Note E><music21.note.Note D>>
{6.0} <music21.note.Note C>
{7.0} <music21.note.Note D>
{8.0} <music21.note.Note F>
{9.0} <music21.note.Note G>
{10.0} <music21.note.Note A>
{11.0} <music21.note.Note B>
{12.0} <music21.note.Note A>
{13.0} <music21.note.Note G>
{14.0} <music21.note.Note F>
{15.0} <music21.volpiano.Neume <music21.note.Note A><music21.note.Note G>>
{15.0} <music21.note.Note G>
{16.0} <music21.note.Note A>
Clefs!
>>> clefTest = volpiano.toPart('1---c--2---c')
>>> clefTest.show('text')
{0.0} <music21.stream.Measure 0 offset=0.0>
{0.0} <music21.clef.TrebleClef>
{0.0} <music21.note.Note C>
{1.0} <music21.clef.BassClef>
{1.0} <music21.note.Note E>
>>> for n in clefTest.recurse().notes:
... n.nameWithOctave
'C4'
'E2'
Flats and Naturals:
>>> accTest = volpiano.toPart('1---e--we--e--We--e')
>>> [n.name for n in accTest.recurse().notes]
['E', 'E-', 'E-', 'E', 'E']
Breaks and barlines
>>> breakTest = volpiano.toPart('1---e-7-e-77-e-777-e-3-e-4')
>>> breakTest.show('text')
{0.0} <music21.stream.Measure 0 offset=0.0>
{0.0} <music21.clef.TrebleClef>
{0.0} <music21.note.Note E>
{1.0} <music21.volpiano.LineBreak object at 0x105250fd0>
{1.0} <music21.note.Note E>
{2.0} <music21.volpiano.PageBreak object at 0x105262128>
{2.0} <music21.note.Note E>
{3.0} <music21.volpiano.ColumnBreak object at 0x105262240>
{3.0} <music21.note.Note E>
{4.0} <music21.bar.Barline type=regular>
{4.0} <music21.stream.Measure 0 offset=4.0>
{0.0} <music21.note.Note E>
{1.0} <music21.bar.Barline type=double>
As layout objects using breaksToLayout=True
>>> breakTest = volpiano.toPart('1---e-7-e-77-e-777-e-3-e-4', breaksToLayout=True)
>>> breakTest.show('text')
{0.0} <music21.stream.Measure 0 offset=0.0>
{0.0} <music21.clef.TrebleClef>
{0.0} <music21.note.Note E>
{1.0} <music21.layout.SystemLayout>
{1.0} <music21.note.Note E>
{2.0} <music21.layout.PageLayout>
{2.0} <music21.note.Note E>
{3.0} <music21.volpiano.ColumnBreak object at 0x105262240>
{3.0} <music21.note.Note E>
{4.0} <music21.bar.Barline type=regular>
{4.0} <music21.stream.Measure 0 offset=4.0>
{0.0} <music21.note.Note E>
{1.0} <music21.bar.Barline type=double>
Liquescence test:
>>> breakTest = volpiano.toPart('1---e-E-')
>>> breakTest.recurse().notes[0].editorial.liquescence
False
>>> breakTest.recurse().notes[0].notehead
'normal'
>>> breakTest.recurse().notes[1].editorial.liquescence
True
>>> breakTest.recurse().notes[1].notehead
'x'
Changed in v5.7 -- corrected spelling of liquescence.
'''
p = stream.Part()
m = stream.Measure()
currentMeasure = m
currentNeumeSpanner = None
noteThatWouldGoInSpanner = None
lastClef = clef.TrebleClef()
continuousNumberOfBreakTokens = 0
bIsFlat = False
eIsFlat = False
for token in volpianoText:
if token == '7':
continuousNumberOfBreakTokens += 1
continue
elif continuousNumberOfBreakTokens > 0:
if not breaksToLayout: # default
breakClass = classByNumBreakTokens[
continuousNumberOfBreakTokens]
breakToken = breakClass() # pylint: disable=not-callable
else:
breakClass = classByNumBreakTokensLayout[
continuousNumberOfBreakTokens]
if continuousNumberOfBreakTokens < 3:
breakToken = breakClass(isNew=True) # pylint: disable=not-callable
else:
breakToken = breakClass() # pylint: disable=not-callable
currentMeasure.append(breakToken)
continuousNumberOfBreakTokens = 0
if token == '-':
noteThatWouldGoInSpanner = None
if currentNeumeSpanner:
currentMeasure.append(currentNeumeSpanner)
currentNeumeSpanner = None
continue
if token in '1234':
noteThatWouldGoInSpanner = None
currentNeumeSpanner = None
if token in '12':
if token == '1':
c = clef.TrebleClef()
else:
c = clef.BassClef()
lastClef = c
m.append(c)
elif token in '34':
bl = bar.Barline()
if token == '4':
bl.type = 'double'
m.rightBarline = bl
p.append(m)
m = stream.Measure()
elif token in normalPitches or token in liquescentPitches:
n = note.Note()
n.stemDirection = 'noStem'
if token in normalPitches:
distanceFromLowestLine = normalPitches.index(token) - 5
n.editorial.liquescence = False
else:
distanceFromLowestLine = liquescentPitches.index(token) - 5
n.notehead = 'x'
n.editorial.liquescence = True
clefLowestLine = lastClef.lowestLine
diatonicNoteNum = clefLowestLine + distanceFromLowestLine
n.pitch.diatonicNoteNum = diatonicNoteNum
if n.pitch.step == 'B' and bIsFlat:
n.pitch.accidental = pitch.Accidental('flat')
elif n.pitch.step == 'E' and eIsFlat:
n.pitch.accidental = pitch.Accidental('flat')
m.append(n)
if noteThatWouldGoInSpanner is not None:
currentNeumeSpanner = Neume([noteThatWouldGoInSpanner, n])
noteThatWouldGoInSpanner = None
else:
noteThatWouldGoInSpanner = n
elif token in accidentalTokens:
if token.lower() in eflatTokens and token in naturalTokens:
eIsFlat = False
elif token.lower() in bflatTokens and token in naturalTokens:
bIsFlat = False
elif token.lower() in eflatTokens and token in flatTokens:
eIsFlat = True
elif token.lower() in bflatTokens and token in flatTokens:
bIsFlat = True
else: # pragma: no cover
raise VolpianoException('Unknown accidental: ' + token +
': Should not happen')
if continuousNumberOfBreakTokens > 0:
breakClass = classByNumBreakTokens[continuousNumberOfBreakTokens]
breakToken = breakClass() # pylint: disable=not-callable
currentMeasure.append(breakToken)
if m:
p.append(m)
return p
def capuaRuleTwo(srcStream):
'''
See capuaRuleOne for precise instructions.
Applies Capua's second rule to the given srcStream, i.e. if four notes are
ascending with the pattern M2 m2 M2, the intervals shall be made M2 M2 m2.
Also changes note.editorial.color for rule 2 (purple purple green purple).
returns the number of times any note was changed
'''
numChanged = 0
ssn = srcStream.flat.notesAndRests
for i in range(0, len(ssn) - 3):
n1 = ssn[i]
n2 = ssn[i + 1]
n3 = ssn[i + 2]
n4 = ssn[i + 3]
if n1.isRest or \
n2.isRest or \
n3.isRest or \
n4.isRest:
continue
i1 = interval.notesToInterval(n1, n2)
i2 = interval.notesToInterval(n2, n3)
i3 = interval.notesToInterval(n3, n4)
if n1.accidental is not None or \
n2.accidental is not None or \
n4.accidental is not None:
continue
### never seems to improve things...
if n3.step == "A" or n3.step == "D":
continue
# e.g., D E F G => D E F# G
# or F A Bb C => F A B C
if i1.directedName == "M2" and \
i2.directedName == "m2" and \
i3.directedName == "M2":
numChanged += 1
if ("capua" in n3.editorial.misc):
n3.editorial.misc['capua_rule_number'] += RULE_TWO
else:
n3.editorial.misc['capua_rule_number'] = RULE_TWO
if (n3.accidental is not None and n3.accidental.name == "flat"):
n3.editorial.misc["saved-accidental"] = n3.accidental
n3.accidental = None
n3.editorial.ficta = pitch.Accidental("natural")
n3.editorial.misc["capua-ficta"] = pitch.Accidental("natural")
n1.editorial.color = "purple"
n2.editorial.color = "purple"
n3.editorial.color = "ForestGreen"
n4.editorial.color = "purple"
else:
n3.editorial.ficta = pitch.Accidental("sharp")
n3.editorial.misc["capua-ficta"] = pitch.Accidental("sharp")
n1.editorial.color = "purple"
n2.editorial.color = "purple"
n3.editorial.color = "ForestGreen"
n4.editorial.color = "purple"
return numChanged
def fix(self):
for (midiRef, omrRef, op) in self.changes:
omrRef.color = "black"
# if they're not notes, don't bother with rest
if self.checkIfNoteInstance(midiRef, omrRef) is False:
continue
# if the are the same, don't bother to try changing it
# 3 is the number of noChange Ops
if isinstance(op, aligner.ChangeOps) and op == aligner.ChangeOps.NoChange:
continue
# don't bother with notes with too big of an interval between them
if self.intervalTooBig(midiRef, omrRef, setint=5):
continue
# case 1: omr has extraneous natural sign in front of it, get rid of it
if self.hasNatAcc(omrRef):
if self.isEnharmonic(midiRef, omrRef):
omrRef.pitch.accidental = None
else:
# case 2-1: midi note is sharp, omr note is one step higher and natural,
# should be a flat instead. e.g midi = g#, gt = a-, omr = an
# omr note has higher ps than midi-- on a higher
# line or space than midi note
if omrRef.pitch > midiRef.pitch:
if omrRef.pitch.transpose(interval.Interval(-1)
).isEnharmonic(midiRef.pitch):
omrRef.pitch.accidental = pitch.Accidental('flat')
# case 2-2: midi note is flat, omr note is one step lower and natural,
# should be a flat instead. e.g midi = g-, gt = f#, omr = fn
# omr note has lower ps than midi-- on a higher line
# or space than midi note
elif omrRef.pitch < midiRef.pitch:
if omrRef.pitch.transpose(interval.Interval(1)
).isEnharmonic(midiRef.pitch):
omrRef.pitch.accidental = pitch.Accidental('sharp')
# case 3: notes are on same step, but omr got read wrong.
# e.g. midi = g#, gt = g#, omr = gn or omr = g-
elif self.hasSharpFlatAcc(omrRef) and self.stepEq(midiRef, omrRef):
if self.hasAcc(omrRef):
omrRef.pitch.accidental = midiRef.pitch.accidental
else:
omrRef.pitch.accidental = None
elif self.hasSharpFlatAcc(omrRef) and self.stepNotEq(midiRef, omrRef):
# case 4-1: notes are on different step, off by an interval of 2,
# omr note is higher and sharp
# e.g. midi = g#, gt = a-, omr = a#
if omrRef.pitch > midiRef.pitch:
if omrRef.pitch.accidental == pitch.Accidental('sharp'):
if omrRef.pitch.transpose(interval.Interval(-2)
).isEnharmonic(midiRef.pitch):
omrRef.pitch.accidental = pitch.Accidental('flat')
# case 4-2: notes are on different step, off by an interval of 2,
# omr note is lower and flat
# e.g. midi = a-, gt = g#, omr = g-
elif omrRef.pitch < midiRef.pitch:
if omrRef.pitch.accidental == pitch.Accidental('flat'):
if omrRef.pitch.transpose(interval.Interval(2)
).isEnharmonic(midiRef.pitch):
omrRef.pitch.accidental = pitch.Accidental('sharp')
# case 5: same step, MIDI has accidental,
# omr was read wrong (e.g. key signature not parsed)
# e.g. midi = b-, gt = b-, omr=
elif (omrRef.pitch != midiRef.pitch
and self.hasSharpFlatAcc(midiRef)
and self.stepEq(midiRef, omrRef)):
omrRef.pitch = midiRef.pitch
def capuaRuleTwo(srcStream):
'''
See capuaRuleOne for precise instructions.
Applies Capua's second rule to the given srcStream, i.e. if four notes are
ascending with the pattern M2 m2 M2, the intervals shall be made M2 M2 m2.
Also changes note.style.color for rule 2 (purple purple green purple).
returns the number of times any note was changed
'''
numChanged = 0
ssn = srcStream.flat.notesAndRests
for i in range(len(ssn) - 3):
n1 = ssn[i]
n2 = ssn[i + 1]
n3 = ssn[i + 2]
n4 = ssn[i + 3]
if (n1.isRest or n2.isRest or n3.isRest or n4.isRest):
continue
i1 = interval.notesToInterval(n1, n2)
i2 = interval.notesToInterval(n2, n3)
i3 = interval.notesToInterval(n3, n4)
if (n1.pitch.accidental is not None or n2.pitch.accidental is not None
or n4.pitch.accidental is not None):
continue
# never seems to improve things...
if n3.step == 'A' or n3.step == 'D':
continue
# e.g., D E F G => D E F# G
# or F A Bb C => F A B C
if (i1.directedName == 'M2' and i2.directedName == 'm2'
and i3.directedName == 'M2'):
numChanged += 1
if 'capuaRuleNumber' in n3.editorial:
n3.editorial.capuaRuleNumber += RULE_TWO
else:
n3.editorial.capuaRuleNumber = RULE_TWO
if n3.pitch.accidental is not None and n3.pitch.accidental.name == 'flat':
n3.editorial.savedAccidental = n3.pitch.accidental
n3.pitch.accidental = None
n3.editorial.ficta = pitch.Accidental('natural')
n3.editorial.capuaFicta = pitch.Accidental('natural')
n1.style.color = 'purple'
n2.style.color = 'purple'
n3.style.color = 'ForestGreen'
n4.style.color = 'purple'
else:
n3.editorial.ficta = pitch.Accidental('sharp')
n3.editorial.capuaFicta = pitch.Accidental('sharp')
n1.style.color = 'purple'
n2.style.color = 'purple'
n3.style.color = 'ForestGreen'
n4.style.color = 'purple'
return numChanged